185th Ave over Butternut Creek
FairWashington County, Oregon · 001 MI W Madeline Street · Structure no. 671238000902350
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected September 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 28 ft
- 1 main span
- Daily traffic
- 21,545
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
185th Ave over Butternut Creek is a prestressed concrete slab carrying 185th Ave over Butternut Creek in Washington County, Oregon. It was built in 1974, so it is 51 years old, older than the Oregon average of 49.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 21,545 vehicles a day, roughly 5% of them trucks, projected to reach 30,855 by 2025. The structure is 28 ft (8.5 m) long and 40 ft wide. If it were closed, the detour would be 0.6 mi (1 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 185th Ave over Butternut Creek built?
It was built in 1974, making it 51 years old in 2025.
What condition is 185th Ave over Butternut Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.
How much traffic does 185th Ave over Butternut Creek carry?
About 21,545 vehicles per day (2020 count), of which roughly 5% are trucks.
How long is 185th Ave over Butternut Creek?
The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 40 ft wide.
Who owns 185th Ave over Butternut Creek?
It is owned by the County Highway Agency.